docs: def _set_params(self):
          """Sets the parameters with types, descriptions and default value if any"""
          # TODO: manage different in/out styles
          if self.docs['in']['params']:
              # list of parameters is like: (name, description, type)
              self.docs['out']['params'] = list(self.docs['in']['params'])
          for e in self.element['params']:
              if type(e) is tuple:
                  # tuple is: (name, default)
                  param = e[0]
              else:
                  param = e
              found = False
              for i, p in enumerate(self.docs['out']['params']):
                  if param == p[0]:
                      found = True
                      # add default value if any
                      if type(e) is tuple:
                          # param will contain: (name, desc, type, default)
                          self.docs['out']['params'][i] = (p[0], p[1], p[2], e[1])
              if not found:
                  if type(e) is tuple:
                      p = (param, '', None, e[1])
                  else:
                      p = (param, '', None, None)
                  self.docs['out']['params'].append(p)